Starting Off Survival With A Small Treehouse

"This is...?" Xu Xin picked up the bottle of gray potion.

【Special Tree House Root Potion (Purple): Pour it under the tree house to promote the growth of the tree house roots, and each potion can expand the tree house's protection range by three kilometers. 】

A purple-grade potion! It is also a potion that expands the protection range of the tree house!

Xu Xin's current protection range of the tree house is three kilometers, and after using this potion, it will expand to six kilometers! This is not only doubled, the protection radius is doubled, and the area is quadrupled!

In other words, Xu Xin, who has used this medicine for her tree house, can move and explore four times as much as it does now! And in this expanded range, there might be another resource area.

Good things, really good things, worthy of a treasure chest.

Xu Xin picked up the thin card again.

[Metal Products Automatic Unlocking Contract (Purple): Can unlock the formula of all metal products. After using this contract, for all metal-related crafting recipes, you only need to obtain all kinds of raw materials to unlock them automatically. 】

After the tree house renovation contract, he got another contract, a contract about the formula of metal products!

With this contract, Xu Xin can no longer only make stone tools anymore!

[Congratulations, you have opened the gold, silver and copper treasure chests, and you have become the first survivor to find all three treasure chests and open them all. The rewards will be distributed after the jungle exploration event ends. 】

[Survivors are requested to make persistent efforts, strengthen themselves, and strive to survive in this world. 】

The mysterious voice sounded again.

He is the first to get all the chests.

The event is not over yet, and I don't know if anyone else will find the golden treasure chest.

To be honest, if Coco hadn't insisted on dragging him down when he said there was a treasure chest below, it would be impossible for him to drill into this hole and dig out an underground passage with his cautious character.

The conditions for obtaining this golden treasure chest are really too harsh.

Xu Xin shook her head, didn't think about it, looked at the contract in her hand and chose to use it.

Just like last time, the card representing the contract shattered in his hand and merged into Xu Xin's body. Xu Xin felt a force pouring into his body.

This time, not only did he feel stronger, but even his mind became clearer. Everything he had just experienced was quickly sorted out in his mind.

First of all, that huge piranha should be the monster guarding the entrance to this underground world.

This abrupt iron room underground, like the people in the room, has been buried underground for many years, but the red mist in the room does not know where it came from.

The people in the room are not from this world, but they came here with the tools and food from his original world, which shows that the way he came to this world is different from the survivors like Xu Xin, but how did he come here? Xu Xin couldn't figure it out now.

The treasure chest of this mission and the secret of the underground space are bound together. The treasure chest should be placed in this position on purpose. Those who find the treasure chest will definitely see the secrets of the underground world before finding the treasure chest. secret.

And those who can't find the location of the golden treasure box will naturally not be able to discover this secret.

Who is that mysterious voice? What is the purpose of bringing them into this world? Could it be that after they grow up, they can fight against the group of monsters deep in the ground?

How did those monsters come about? The size gap between them and the creatures on the surface is really too big.

He thought of the giant anaconda in the middle of the lake and the giant crocodile at the bottom of the stream. These two huge creatures beyond common sense must have come out of the ground, and the connection under the lake is probably a kilometer deep underground.

There is also the potion in the golden treasure chest.

Xu Xin looked at the bottle of gray medicine in his hand. The whole bottle of medicine was only about 300 milliliters, and the weight was about the same as the filled drink.

The function of the medicine is to promote the growth of the roots of the tree house and expand the protection range of the tree house. Does this mean that the roots of the tree house are what protect Xu Xin and the others from the underground creatures?

A picture appeared in Xu Xin's mind.

During the two hours when the tree house grew, while the tree house on the ground grew, the roots of the tree house also differentiated underground, extending in all directions and extending to three kilometers away.

The roots of the tree house are densely covered underground, blocking monsters that want to come out of the ground. Once a monster appears, it will be sucked by the roots of the tree house and quickly become dry and brittle specimens.

Therefore, when the roots of the tree house grow longer, the protection range of the tree house will also increase accordingly.

Xu Xin felt that this explanation made sense.

This also explains why the mysterious voice emphasized over and over again that the small tree house must not be abandoned, because the tree house is the most powerful weapon and the greatest guarantee against underground monsters.

After thinking through all this, Xu Xin also felt a little relieved. According to what the mysterious voice said before, the underground monsters will not attack them at least in the near future. They only need to concentrate on dealing with the beasts on the ground.

The tree house will protect them.

Xu Xin put the treasure chest into her backpack. Although the golden treasure chest is made of gold and is very heavy, Xu Xin's strength has been boosted several times and he is no longer the original him. Combined with the backpack that reduces the weight to 20%, this treasure chest is carried on the back without any burden. question.

He was actually looking forward to getting all three treasure chests together, and what would happen after the pattern was put together.

Before leaving, he decided to take another look at the underground world. After all, after he went out this time, he probably wouldn't come back here for a long time.

Ke Ke didn't walk to the edge of the cliff like him, but lay down on the back, a little scared away from the cliff.

It's still the same scene of demons dancing wildly.

Huge monsters covered in seaweed, giant piranhas several times larger than the piranhas on the ground, blood-red vines all over the place, and firefly-like creatures the size of small cars, and some other completely different creatures on land. Impossible megafauna and flora.

These things are what he will have to face in the future.

He must improve himself quickly, so that he has the ability to fight against these things!

Xu Xin looked forward, and suddenly his eyes froze.

He saw many downward protrusions on the top of the entire underground world.

Now Xu Xin's position is equivalent to the lights on the ceiling in the room, and those protrusions are other lights.

"These protrusions should be the tree houses of other survivors, or the roots of the tree houses." Xu Xin was thoughtful.

According to his deduction, these raised interiors should be the intricate roots of the tree house, used to protect these survivors from these subterranean creatures.

"Although we don't know who brought us here, he must be playing a big game of chess."

Xu Xin took one last look at the underground world, then turned her head and walked back to the iron room.

The skeleton was still scattered on the ground, Xu Xin grabbed Ke Ke who was about to go up to play with the ball, and pressed it on his shoulder.

"Hey!" Ke Ke yelled with some dissatisfaction, but still obediently lay on his shoulder.

The next task seems simple but not simple.

Climb up!

Looking at this deep passage, Xu Xin felt her legs were trembling.

Just climbing down before made his arms extremely sore, and he still has to climb up!

He even carries a gold treasure chest!

Tired him to death!

Xu Xin glanced at the little guy on his shoulder: "Can you climb by yourself?"

"Hey!" Coco shook his head violently.

"You're too lazy!"

"Hey!" Ke Ke wanted to refute, the distance between each step was almost as long as its body, how could it climb!

Sighing, Xu Xin decided to eat something before climbing. After all, he vomited all the food he ate last night on the top. Although the contract just now made his body recover a lot of energy, but after staying down for so long, I'm afraid it's already dawn above, and it's time to eat.

Just when he took out an apple and wanted to chew it, there was a hissing sound from his side.

"what sound?"

Xu Xin turned her head warily.

In his horrified gaze, the half-open iron door suddenly closed automatically with a loud noise, and then a familiar red gas gushed out from the gap between the wall and the floor of the iron room, and gradually spread.

"Damn!!!"